The Parasites of Fish and Shellfish session will address the following topics: The Fundamentals of Aquatic Veterinary Medicine Teaching and Learning Resource; a comparative study on metals and parasites in shellfish of freshwater and marine ecosystems; protozoal parasites of ornamental fish; prevention techniques for selected freshwater parasites; parasitic worms and crustaceans of ornamental fish; interactions of metals, glyphosate, parasites and epigenetics in shellfish and fish: a review; transcriptome modulation of Salmo Salar immunized with Caligus rogercresseyi vaccine prototype: a host-parasite interaction; novel genomic markers associated with pharmacological resistance in the sea lice identified through whole-genome resequencing; untangling sea lice microbiota: novel insights in the biological role and potential threat associated with the salmon aquaculture; cell-based antigens prospection through transcriptome analysis uncovers vaccine candidates in Atlantic salmon against sea lice: transmission of parasites, larval sea lice (Lepeophtheirus salmonis ) exhibit behavioral responses to pre-adult and adult conspecific cues, among others. Additional papers will be presented at the poster session including: pain in aquatic invertebrates – the questioning triad; ghosts of oceans past: what can data on historical parasite burdens tell us about the future of marine disease?; and the parasite Sylon hippolytes alters the fatty acid compositions of the dock shrimp Pandalus danae.